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A178821 as a triangular array

1
55
153015
3510510535
7028042028070
12663012601260630126
21012603150420031501260210
33023106930115501155069302310330
495396013860277203465027720138603960495
71564352574060060900909009060060257406435715

A178821 as a square array

15153570126210330495715
5301052806301260231039606435
151054201260315069301386025740
3528012604200115502772060060
706303150115503465090090
126126069302772090090
21023101386060060
330396025740
4956435
715
15153570126210330495715
5301052806301260231039606435
151054201260315069301386025740
3528012604200115502772060060
706303150115503465090090
126126069302772090090
21023101386060060
330396025740
4956435
715